Massena STP
302 E Orvis St, Massena, NY 13662 · St. Lawrence County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 4.8 MGD
- NPDES permit
- NY0031194
- Administratively continued
- Permit expires
- November 2020
- Population served
- 12,268
- CWNS 2022
Massena STP is a publicly owned wastewater treatment works in Massena, St. Lawrence County, New York, serving about 12,268 residents. It discharges under NPDES permit NY0031194 (administratively continued), which expires in November 2020, with 11 recorded violations in the last three years. EPA has recorded 4 formal enforcement actions naming the plant, the latest in January 2026.
Treatment technology
2 treatment structures and unit processes identified at Massena STP.
Available with a free Klarifi account
See the full treatment train at Massena STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 11
- Effluent violations
- 11
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Massena STP in EPA's ICIS system.
- Formal actions
- 4
- 1 since FY2020
- Penalties assessed
- $1,000
- all cases
- Compliance actions
- $5,016
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Jan 2026
Village of Massena
Administrative order · CWA, NPDES Discharge without a Permit · Final Order No Penalty · Compliance actions $5,000
EPA's description of the case:
“To develop and submit to EPA, and NYSDEC written O&M procedures for the sewer collection system.”
Source: EPA ECHO, civil enforcement case 02-2024-3045.
Full case history with a free Klarifi account
Every action against Massena STP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
3 verified contacts for Massena STP, with validated emails and direct phone numbers.
Unlock 3 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Massena STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in New York
Norfolk · 11 mi away
0.18 MGD
North Lawrence · 14 mi away
0.02 MGD
Norwood · 15 mi away
0.41 MGD
Waddington · 16 mi away
0.12 MGD
Potsdam · 19 mi away
1.36 MGD
Fort Covington · 19 mi away
0.04 MGD
Saint Regis Falls · 24 mi away
0.02 MGD
Lisbon · 26 mi away
0.02 MGD
Massena STP: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 26, 2026; facility record last updated March 2, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Oxidation ditch · Anaerobic digester · all terms